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Replacing Your BMW Brake Calipers
 
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Pelican Technical Article:

Replacing Your BMW Brake Calipers

Nick Czerula

Time:

3 hours3 hrs

Tab:

$200

Talent:

****

Tools:

Socket set,

Applicable Models:

BMW 325i Sedan (2006)
BMW 325xi Sedan/Wagon (2006)
BMW 328i Coupe/Conv (2007-13)
BMW 328i xDrive Coupe (2009-13)
BMW 328i xDrive Sedan (2009-11)
BMW 328i xDrive Wagon (2009-12)
BMW 328i/xi Sedan (2007-11)
BMW 328i/xi Wagon (2007-12)
BMW 328xi Coupe (2007-13)
BMW 330i/xi Sedan (2006)
BMW 335d/i/xi Sedan (2007-11)
BMW 335i xDrive Coupe (2009-13)
BMW 335i xDrive Sedan (2009-11)
BMW 335i/is Coupe/Conv (2007-13)
BMW 335xi Coupe (2007-13)

Parts Required:

Brake caliper, brake fluid

Hot Tip:

Bleed entire brake system

Performance Gain:

Great brake feel

Complementary Modification:

Replace brake pads and hoses at same time.

The brake caliper is responsible for providing the clamping force needed on the brake pads to slow your vehicle down. The brake caliper can leak fluid as it ages from the piston seal and also becomes corroded or restricted resulting in poor brake performance. If a brake caliper is not performing at 100%, you may notice a slight pull to one side when braking. You can service each brake caliper individually or both at the same time. I recommend replacing in pairs to maintain an even brake feel. If one caliper is failing, the other will not be far behind.

Lift and support axle of vehicle you are replacing brake pads on. See our tech article on jacking up your vehicle.

Remove wheels on axle you are replacing brake caliper on.

There are two ways to reduce the amount of brake fluid loss when replacing your brake caliper. One way is to clamp the hose with a hose clamp tool to prevent fluid from leaking. Be aware that this method could lead to a damaged hose if done incorrectly.

I prefer to use the second method, depress brake pedal half way and hold in place with stick or brake pedal depressing tool.
Figure 1

I prefer to use the second method, depress brake pedal half way and hold in place with stick or brake pedal depressing tool. This will keep fluid in the master cylinder from leaking.

Pull brake pad wear sensor (green arrow) out of brake pad on the driver side brake pad.
Figure 2

Pull brake pad wear sensor (green arrow) out of brake pad on the driver side brake pad. Be very careful as sensor tends to break when removed. I like to use a pair of needle nose pliers to pull sensor out. (If equipped)

Next, pull sensor wiring harness mount off brake line.
Figure 3

Next, pull sensor wiring harness mount off brake line. (green arrow) (If equipped)

Working at brake caliper using a 14mm line wrench, loosen brake hose.
Figure 4

Working at brake caliper using a 14mm line wrench, loosen brake hose. (green arrow) Do not remove; you will unscrew hose from caliper later. You can use a regular 14mm open end wrench, however you risk damaging the hex on the brake line.

Using a flathead screwdriver, remove brake caliper anti-rattle spring by prying out while securing with hand.
Figure 5

Using a flathead screwdriver, remove brake caliper anti-rattle spring by prying out while securing with hand. The spring can pop off and go flying, be sure to hold it steady.

Using a flathead screwdriver, slowly press brake caliper piston in.
Figure 6

Using a flathead screwdriver, slowly press brake caliper piston in. This allows brake caliper to be pulled off brake rotor easily. I like to pry between the outer brake pad and brake rotor. This way there is less chance of damaging the caliper piston. Be careful not to damage brake pads if you intend to reuse them

Remove rubber plugs from brake caliper mounting fasteners.
Figure 7

Remove rubber plugs from brake caliper mounting fasteners. (green arrows)

Next, using a 7mm Allen bit, remove brake caliper mounting fasteners.
Figure 8

Next, using a 7mm Allen bit, remove brake caliper mounting fasteners. (green arrows)

Remove brake caliper from mounting bracket and unscrew brake hose from caliper.
Figure 9

Remove brake caliper from mounting bracket and unscrew brake hose from caliper. Screw new caliper into brake hose then install caliper in mounting bracket. Tighten caliper mounting fasteners and install plugs and anti-rattle clip.

Then tighten caliper brake hose.
Figure 10

Then tighten caliper brake hose. Clip brake pad wear sensor wiring harness back onto brake hose, if equipped. Bleed brakes.

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Comments and Suggestions:
wuelfman Comments: so in figure 8 my brake caliper mounting fasteners one is stripped so that i can even get the 7 mm in to remove it.
any advise to remove it. so i can replace it ?
November 2, 2015
  Followup from the Pelican Staff: You will need to replace the rubber caliper sleeve to get it out. Which may require replacing the caliper. Cut the rubber sleeve away, then use vise grips to loosen the fastener. Give our parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
Yangorang Comments: So when ordering front calipers for my vehicle made in 11/2007 34116778145 it seems like the vendor accidentally sent me the older version I see pictured here 34116769091.

I notice the older version actually looks a bit beefier - what are the major differences? Could I bolt the older version on as long as I have the right version of caliper carrier to go along with it?
April 21, 2015
  Followup from the Pelican Staff: The differences are likely the brake manufacturer. Give our parts specialists a call at 1-888-280-7799. They can help you find the right part.
- Nick at Pelican Parts
 
Troy09 Comments: I like Pelican Tech Art, definitely a place to refer a friend
July 15, 2013
  Followup from the Pelican Staff: - Ken at Pelican Parts
Thanks, we appreciate the feedback!
 

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